Convert between Unix timestamps and human-readable dates.
Everyday tool
Date/Time Add/Subtract Calculator
Add or subtract time units from a date and time.
Personal or Dual plan
Included in the Personal plan (from $4/month), in Dual (Personal and Business together) and in the 7-day free trial.
No payment card is needed to start the trial.
What you get
Why use Date/Time Add/Subtract Calculator online
Nothing to install
Date/Time Add/Subtract Calculator runs in a modern browser on desktop, tablet and phone. Open it in a tab and start; there is nothing to download or update.
Your work stays yours
Anything you save is stored in your account, can be exported, and is not sold.
Part of the everyday set
Sits alongside the other everyday tools, calculators and planners in the same account.
Connections
Works well with
Tools that connect to Date/Time Add/Subtract Calculator in the same account.
Convert a date and time between timezones.
Count working days between two dates, excluding weekends and holidays.
Questions
Frequently asked questions
Is Date/Time Add/Subtract Calculator free to use?
Date/Time Add/Subtract Calculator is included in the Personal plan from $4/month, and in the Dual plan (Personal and Business together). Every new account starts with a 7-day free trial of every tool, and no payment card is needed to start.
Do I need to install anything to use Date/Time Add/Subtract Calculator?
No. Date/Time Add/Subtract Calculator runs in a modern browser on Windows, Mac, Linux, iPhone and Android. There is nothing to download, update or uninstall.
Is my data private when I use Date/Time Add/Subtract Calculator?
Anything you save is stored in your account, can be exported, and is not sold. You can download everything at any time with Export My Data.
Does Date/Time Add/Subtract Calculator work on my phone?
Yes. Date/Time Add/Subtract Calculator runs in a modern browser on desktop, tablet and phone.
What else is included with Date/Time Add/Subtract Calculator?
Xerion has 199 browser-based tools across 9 categories: Business, Creative, Developer, Everyday, Finance, Fun & Games, PDF, Productivity and Security. The 7-day free trial includes every one of them; after that, the plan you pick decides which are included.
Hear about new tools when they shipLeave your address and we will let you know when something new lands on Xerion.
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Get started
Try Date/Time Add/Subtract Calculator free for 7 days
Every new account starts with a 7-day free trial of every tool. No payment card is needed to start, and your saved work is kept whatever you decide afterwards.
Included in the Personal plan (from $4/month), in Dual (Personal and Business together) and in the 7-day free trial. Already have an account? Log in.